Currently, I have a project that uses CUDA, GLSL and OptiX. OpenGL’s PBO interop with OptiX does not give me any problems, however, when i use createTextureSamplerFromGLImage for OpenGL textures, there is an error that appear when my OptiX kernel is executing.
I tested the code with a simple snippet as such:
GLuint tempTex2D; glGenTextures(1, &tempTex2D); glBindTexture(GL_TEXTURE_2D, tempTex2D); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, max_voxel_size, max_voxel_size, 0, GL_RGBA, GL_FLOAT, NULL); glBindTexture(GL_TEXTURE_2D, 0); //register the gaussian framebuffer output into the single scatter texture TextureSampler tempSampler = Ctx->createTextureSamplerFromGLImage( tempTex2D ,RT_TARGET_GL_TEXTURE_2D); tempSampler->setWrapMode(0, RT_WRAP_CLAMP_TO_EDGE); tempSampler->setWrapMode(1, RT_WRAP_CLAMP_TO_EDGE); tempSampler->setIndexingMode(RT_TEXTURE_INDEX_NORMALIZED_COORDINATES); tempSampler->setFilteringModes(RT_FILTER_NEAREST, RT_FILTER_NEAREST, RT_FILTER_NONE); tempSampler->setReadMode(RT_TEXTURE_READ_NORMALIZED_FLOAT); tempSampler->setMaxAnisotropy(1.0f); Ctx["temp_tex"]->setTextureSampler(tempSampler);
rtTextureSampler temp_tex is declared in my kernel, but I did not used it or access, since I was testing if the interop would work for me:
rtTextureSampler<float4, 2> temp_tex;
The error occured the moment my Optix kernel was launched and produced the error:
OptiX Error: Invalid value <Details: Function “_rtContextLaunch2D” caught exception: GL error: invalid operation, >
When I test by adding the same code snippet to the collision example in the Optix SDK. I was not able to replicate the error mainly because the rendering pass was in OpenGL. However, the original green outline surrounding the spheres became black, as well as the black lines used to connect the nearest colliding sphere.
Image on the left is the original application. The one on the right happens after I add a code snippet into the initScene() function in CollisionOptiX.cpp. I did realized that irregardless whether “rtTextureSampler<float4, 2> temp_tex” was declared in the collision_aux.cu file, the result was the same.
Have anyone encountered the same bug as me when using interop with OpenGL and OptiX?